assertEquals("http://localhost:8080/", u1.toString());
assertEquals("http://localhost:8080/?test=webx3", u1.render());
// u1.toString以后,interceptor不被执行。
u1.toString(); // http://localhost:8080/
URIBroker u2 = u1.fork();
assertEquals("http://localhost:8080/", u2.toString());
assertEquals("http://localhost:8080/?test=webx3", u2.render());
assertEquals("http://localhost:8080/", u2.toString());
}